CAPE Biology Unit 1 · 2008 (Rest of Region) · Paper 1 · Question Q6
Item 6 refers to tests performed by students to identify food substances present in a solution. The tests were carried out and their respective results are shown in the table below. \begin{tabular}{|l|l|} \hline \textbf{Test} & \textbf{Result} \\ \hline Biuret test & Purple colour was obtained \\ \hline Benedict's test & Blue colour remained on heating. \\ \hline Dilute hydrochloric acid was added and the & Blue colour became brick-red on \\ mixture was boiled, allowed to cool, neutralized & heating. \\ and Benedict's test was carried out. & \\ \hline \end{tabular} Which of the following indicates the food substance(s) present in the students' solution?
- (A)Starch, protein
- (B)Non-reducing sugar only
- (C)Reducing and non-reducing sugars
- (D)Non-reducing sugar and protein
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